9.　　　 It’s his turn ____________(buy) the book of history.

8.　　　 They ___________(work) in the factory since ten years ago

7.　　　 After ___________ (brush) the teeth, she went to sleep.

6.　　　 We are busy ___________(pack) the books.

5.　　　 The Smiths ___________(have) dinner. They are walking now.

4.　　　 You ___________(catch) up with him if you work hard.

3.　　　 Many changes ____________(happen) in the past 5years.

2.　　　 Our classroom is very clean now. Who ___________(clean) it?

1.　　　 _________ they ever___________(visit) a foreign country?

5．Have gotten yet 6.How long has learnt